High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! Russell is an over 100 year old narrow gauge steam locomotive originally built for the North Wales Narrow Gauge Railways (NWNGR), but most famously associated with the original Welsh Highland Railway (WHR), and currently undergoing a rebuild at the Welsh Highland Railway (Porthmadog). There have been a number of books written either about, or containing details of the engine, but the succinct parts are detailed below.